Angus mcdougall



, A. McDOUGALL. COMBINATION SCREW DRIVER, AUGER, ANDGOUNTERSINK.

' Patented Aug. 21, 1894.

(No Model.)

777 E g 4z.

. UNITEnSTATEs PATENT OFFIcn.

ANGUS MoDOUGALL, O-F BOSTON, MASSACHUSETTS, ASSIGNOP. To LUT E;

LEWIS, OF SAME PLACE;

COMBINATION SCREW-DRIVER, AUGER, AND COUNTERSINK. V

SPECIFICATION forming part of Letters Patent No. 524,906, dated August 21, 1894. Application filed January 6, 1394- Serial No. 495,946. (No model.)

To aZZ'whom it may concern:

Be it known that I, ANGUS MODOUGALL, of Boston, in the county of Sulfolk, State of Mes sachusetts, have invented certain new and usewhich- Figure 1 is an elevation of my improved tool, the auger being detached. Fig. 2 is a side elevation of the same showing the counter-sink projected; and Fig. 3 a Vertical section with the anger in position.

Like letters of reference indicate corresponding parts in the different figures of the drawings.

My invention relates especially to a combination tool for use with bit stocks in which a screw-driver, auger and countersink may be separately employed without removing the bit; and it consists in certain novel features hereinafter fully set forth and claimed, the object being to produce a simple, cheap and effective device of this character.

The nature and operation of the improvementwill be readily understood by all conversant with such matters from the following explanation:

In the-drawings, A represents the body of the tool which is provided with the ordinary bit-head, b, at one end, its opposite end being reduced to form a screw-driver, d, of the usual shape. a verticalor longitudinally arranged chamber, f. A rod, g, is fitted to slide through the bottom of said chamber in parallelism with the screw-driver said rod being pushed inwardly by a spring, h, which is interposedbetween a pin, 11, on the rod and the chamber bottom. The upper end of the chamber is open at j, so that the end of the rod may project therethrongh when housed. To the outer end of the rod and projecting laterally therefrom a counter-sink, 7c, is secured or formed One face of the body is provided with integral therewith. Said countersink has a vertical opening through its center to rece ve the head of an anger, m, which may be secured therein by a set-screw, p.

- The upper edge of the counter-sink 1s slotted transversely at, q. When the rod, g, is housed as in Fig. 1, the countersink engages thelower end of the chamber, f, and the anger may remain therein or be removed as desired. The implement is now in condition to be employed for the usual purposes of a screwdriver.

To use the auger and counter-sink the rod, g, is drawn outward compressing the spring, h, said rod being then rotated until the countersink passes under the edge of the screw driver which enters the slot, q, and is held by the tension of the spring. be operated in. the usual manner of an auger therotation of the rod independently of the screw-driver being prevented by said slot. By releasing the counter-sink from the driver edge and rotating it until out of engagement, the spring, h, will drive the rod, g, inward until the counter-sink engages the chamber. By this arrangement of parts the necessity of re moving the bit from the stock and substituting for each form of tool is avoided. I do not confine myself to using a chamber, f, as any device which will guide the spring-pushed rod on the shank or body of the screw-driver may be employed.

Having thus explained my invention, what I claim is- 1. A screw-driver in combination with a spring-pushed rod fitted to slide and rotate on one face thereof and bearing a countersink tool at its outer end, said tool being adapted to be engaged with the driver-point substantially as and for the purpose set forth.

2. A screw-driver in combination with a spring-pushed rod fitted. to slide longitudinally thereon and having a head projecting laterally from its outer end, said head being adapted to receive a tool and engage with the driver-point.

3. A screw-driver in combination with a. spring-pushed rod fitted to slide longitudinally thereof, a slotted and socketed headon The tool may now the outer end of said rod, said slot being ar- I counter-sink, k, having the slot, q,: the'auger, ranged to receivethe driver-point and a-tool m, in said counter-sinkand devices for dedetachably secured in said socket. tachably securing said auger.

4. The screw-driver provided with a lcngi- ANGUS MODOUGALL. 5 tudinally arranged chamberfas f, in combi- Witnesses:

nation with a spring-pushed rod,,g,jfitted to K. DURFEE,

slide in said chamber and provided with the 0.1M. SHAW. 

